ci: replace PDM with UV (#73)

Replacing PDM with UV improves the integration with tox. It is no longer
needed to install pyenv, download Python versions, etc. Instead `uv`
takes care of these details.

All that is needed is

```BASH
uv tool install tox --with tox-uv
tox
```

to run compatibility tests with multiple Python versions.

Author: feeph

.github/workflows/build-and-upload.yaml

@@ -1,29 +1,36 @@
 ---
-name: publish on TestPyPI
+#
+# documentation:
+#  - https://docs.pypi.org/trusted-publishers/
+#  - https://github.com/astral-sh/trusted-publishing-examples/blob/main/.github/workflows/release.yml
+#
+name: publish package on TestPyPI
 
 on:
-  release:
-    types: [published]
-  workflow_dispatch:
+  push:
+    tags:
+      - v*
 
 jobs:
   build-and-upload:
     name: build package and upload to PyPI
     runs-on: ubuntu-latest
-    environment: publish-to-pypi-test
+    environment:
+      name: publish-to-pypi-test
     permissions:
       contents: read
       id-token: write
     steps:
-      - uses: actions/checkout@v4
-      - uses: pdm-project/setup-pdm@v4
-      - name: Publish package distributions to PyPI
-        run: pdm publish --repository testpypi
-      # publish to PyPI (generic)
-      # - name: Publish package distributions to PyPI
-      #   uses: pypa/gh-action-pypi-publish@release/v1
-      # publish to Test-PyPI (generic)
-      # - name: Publish package distributions to TestPyPI
-      #   uses: pypa/gh-action-pypi-publish@release/v1
-      #   with:
-      #     repository-url: https://test.pypi.org/legacy/
+      - name: Checkout repository
+        uses: actions/checkout@v6
+      - name: Install uv
+        uses: astral-sh/setup-uv@v7
+      - name: Build package
+        run: uv build
+      # Check that basic features work and we didn't miss to include crucial files
+      # - name: Smoke test (wheel)
+      #   run: uv run --isolated --no-project --with dist/*.whl tests/smoke_test.py
+      # - name: Smoke test (source distribution)
+      #   run: uv run --isolated --no-project --with dist/*.tar.gz tests/smoke_test.py
+      - name: Publish package
+        run: uv publish

.github/workflows/validate-code.yaml

@@ -30,7 +30,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: identify changed files
         uses: tj-actions/changed-files@v46
         id: changed-files
@@ -41,32 +41,27 @@ jobs:
             contrib:
               - examples/**.py
               - test/**.py
-      - name: configure Python (using PDM)
-        uses: pdm-project/setup-pdm@v4
-        with:
-          python-version-file: pyproject.toml
-      - name: install dependencies
-        run: |
-          pdm install
+      - name: install uv
+        uses: astral-sh/setup-uv@v7
       - name: lint code (flake8)
         env:
           LIBRARY_FILES: ${{ steps.changed-files.outputs.library_all_changed_files }}
           CONTRIB_FILES: ${{ steps.changed-files.outputs.contrib_all_changed_files }}
         run: |
           if [[ -n $LIBRARY_FILES ]] || [[ -n $CONTRIB_FILES ]]  ; then
             # the GitHub editor is 127 chars wide
-            pdm run flake8 --max-line-length=127 --show-source --statistics $LIBRARY_FILES $CONTRIB_FILES
+            uv run flake8 --max-line-length=127 --show-source --statistics $LIBRARY_FILES $CONTRIB_FILES
           fi
       - name: lint code (mypy)
         env:
           CONTRIB_FILES: ${{ steps.changed-files.outputs.contrib_all_changed_files }}
         run: |
           # since this is a namespace package we must instruct mypy to scan
           # the code as a namespace package; it won't work if we scan files
-          pdm run mypy -p feeph.i2c
+          uv run mypy -p feeph.i2c
           # example scripts and tests can be scanned as files
           if [[ -n $CONTRIB_FILES ]] ; then
-            pdm run mypy $CONTRIB_FILES
+            uv run mypy $CONTRIB_FILES
           fi
   test:
     name: perform unit tests
@@ -81,15 +76,19 @@ jobs:
           - "3.12"
     steps:
       - name: checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: configure Python ${{ matrix.python-version }}
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
+      - name: install uv
+        uses: astral-sh/setup-uv@v7
       - name: install dependencies
+        with:
+          python-version: ${{ matrix.python-version }}
         run: |
+          uv export --format=requirements.txt --all-extras --dev > requirements.txt
           pip install -r requirements.txt
-          pip install pytest pytest-md pytest-emoji
       # https://github.com/marketplace/actions/run-pytest
       - name: perform unit tests (Python ${{ matrix.python-version }})
         env:

.python-version

@@ -0,0 +1 @@
+3.12.9

README.md

@@ -3,8 +3,8 @@
 [![Copier](https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/copier-org/copier/master/img/badge/badge-grayscale-inverted-border-purple.json)](https://github.com/copier-org/copier)
 [![pre-commit](https://img.shields.io/badge/pre--commit-enabled-brightgreen?logo=pre-commit)](https://github.com/pre-commit/pre-commit)
 [![Coverage Status](https://coveralls.io/repos/github/feeph/libi2c-python/badge.svg)](https://coveralls.io/github/feeph/libi2c-python)
-[![pdm-managed](https://img.shields.io/endpoint?url=https%3A%2F%2Fcdn.jsdelivr.net%2Fgh%2Fpdm-project%2F.github%2Fbadge.json)](https://pdm-project.org)
-[![tox](https://img.shields.io/badge/tox-ab79d2)](https://tox.wiki/)
+[![uvm-managed](https://img.shields.io/badge/packaging-uv-ab79d2)](https://docs.astral.sh/uv/)
+[![tox](https://img.shields.io/badge/testing-tox-ab79d2)](https://tox.wiki/)
 
 abstraction layer for the I²C bus (incl. simulation for testing)